Binding device for molds, etc.



Mar`h29,1927. 1,622,889.

E. E. SPEER BINDING DEVICE FOR MOLDS, ETC

Filed Feb. l5, 1926 Invm-on.

A.TroRNEY.

Patented Mar. 29, 1927,

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ylAxfiSNT"n?ICE.

BiiLs'roN, vIReINrA.

'i BI-NDI'NG DEVICE non Molins, nrc;

Applcationfled February ,Mya invention 'relates to binding devices for reinforcing molds or form-s usedv in concrete construction work and more especially to the provision of a clamp for use in tighteningthe binding straps around the mold and irmlyconnecting the ends thereof together to provide arigid structure g` 4thefpresent-invention being an improvemencupon the clamping device shown in: my prior Patent No` 1,268,061, dated May 28, 1918. Infthedevice' shown inthe patent `the flanged plate or .keeper of the clampis provided with a cam at eachend for'v connecting t-he ends of the metal strap which is bound around the mold and although this arrangement possesses certain advantages, particu larly when it is desired to draw uponl both ends of the strap successivelyk in tightening the same. aroundthe mold, Iihave found that `in .many instances the strap or.-4 band can ,be drawn. tightly by drawing upon one end only and'- although this operation was contemplated in'my prior. patent I `have discovered V that the clamping device can be simplified and. manufactured more .economically by employing the improved means, herein. disclosed, for connecting one end of the metalstrap `onband to the base-plate of the clamp, and, furthermore, that the form of `cam used... inthe present instance for gripping the other Vendnof the metal strap or band will facilitatethe operation thereof; these improvements` also permitting a reduc'- tion in the length ofthe baseplate.

lVith these principalobjects in View lny present inventionl consists'in the particular construction of the clampor device for tightening` and securing theends of a binding strap around a mold or other'objeci vto be reinforced in thisl manner.; .all as herein! after fullyr described and. set f0rth,in the appended claims. In the accompanying,drawings:` Figurel,y is a side ,elevation lshowingthe application of my inventionfto ya mold, or form for, yconstructing a concrete column.

Fig. l2l` is a Ilongitudinal ,sectional .View` iof the clamp,lenlarged, showing theends ofthe binding strap secured thereto,

1511928. 'serial No.` 88,418.

-Fig.- v3 is-,a detail side elevation ofthe 50 clamp. 1 j u l yFiga/4 is a planviewthereoh'and `Figg is a side view illustrating the operation of tightening the 'strap or band with apulling implement which cooperates with the clamping device. I 'i The main part of the metal clamping device is preferably formed by casting to pro-l vide abaisse-plate 10 with ears 11 11 at one end thereof to receive alcam 12 between 60 them, and ears 14 14 at the other end to receive a pulling implement, such as herein-` after described,for drawing on one end of the binding strap or band;y said pairsof ears rising Vfrom the base-plate atl opposite side edgesthereof.r The-ears 11 are piercedrto receive a-.-.pintle 13` on which the cam 12 is mounted, and the earsli are provided with recesses 16 openingl out at theupper end thereof, said recesses being rounded at their, lower en ds to form seats-in which the pulling implement 'is vfulcrumed.` In the present instance a transversev slot 17 is formedin thefbase-plate near the end thereof opposite vthe cam' for connecting one end of the 75 metal binding strap or band 15 to the clamp, the length and width of said slot being such asrto receive an end portion of the ,strap bent 'upon-itself as shown in dotted lines Fig. 2, .whereby when the looped end 15H1- 80 passed upward Vthrough the slot-is flattened upon the base`plate and the portions of the strap below the latter are bent in opposite directions `against vthe yunderside thereof, as shown invfull lines, this end of the metal strap will be securely connected to the clamping device;

i The ends of the pintlel 13 upon which the cam A12` is mounted and which pass through the lears 11 are upset'at'the outer side of said 90 ears ,foipermanently connecting the' parts together, fandin` the lpresent instance' the cam is operated-to clamp thel metal strap 15 against the 4base-plate by means of a shank 18pr,ojecting;upwardly therefrom at right 95 angles 'Eto its-axis,l whereby instead-lof turnin'gthefcam by 4means ofa wrench. as provided for 'in the construction shown `in my y prior patent it is turned by simply striking the project-ion or shank with a. hammer, and it will be obvious that this arrangement not only facilitates the operation but permits the cam to be driven tighter against the band in clamping it against the base-plate.

Although any approved type of pulling implement may be employed for tightening the metal strap l5 around the mold I haveI illustrated a preferred form consisting of two parts or members pivoted together, one being a block 20 having trunnions 22 at its lower end by which it is fulcrumed bctween the ears la of the clamp hereinbefore described and provided with upwardly projecting spaced apart arms or plates 23, and the other a lever 2l pivoted between the arms or plates on a transverse pin 24; the inner end of the lever cooperating with the block in clamping the metal strap between them. The surface of the block between the ears, over which the metal strap passes, is eccentric to the aXis of the block and the swinging movement of the lever between the ears or plates is limited in one direction by contact with said surface and in the other direction by a pin 25 projecting from the lever engaging a stop-shoulder 26 formed at the upper end of one of the plates.r

In tightening a metal band around an object to be reinforced, for instance a form for molding a concrete column as shown in the drawings comprising a box A with beveled-end battens B at the four sides thereof, one end of the metal band is connected to the clamping device by means of the slot l? in the manner hereinbefore described and after passingsaid band around the mold or battens B the other end thereof is threaded between the cam l2 and base-plate and drawn tight by the pulling implement mounted between the ears la as shown in Fig. 5. When the band is drawn tightly around the mold the end thereof which passes below the cam to the pulling implement is secured to the clamping device by turning the cam againstthe same to clamp this end of the metal band against the base-plate. The pulling implement is then removed for use in applying other metal straps or bands around the mold, it being understood of course that a clamping device is used in the operation of applying and securing each reinforcing band that is einployed in binding the mold.

In attaching one end of the binding strap to the clamping device through the medium of the slot 17 I have found itmore convenient to flatten out the loop 15L in a vise before passing the strap through said slot, and of course in this instance the other end of the strap would be passed downward through the slot and drawn through until the flattened loop rested on the base-plate, after whicn the terminal of the strap is bent inward iaasea against the base-plate and the body portion of said strap bent outward against the baseplate, being held firmly against the mold when the strap is bound tightly around the same, that is to say the port-ions of the metal strap lying against the underside of the base-plate are clamped against the mold and insure a firm connection which will withstand the pulling strain on the strap tightened around the mold.

The device hereinbefore described not only facilitates the operation of applying a metal strap around a mold for reinforcing the same but also connects the ends of the strap in such manner as to not injure the same, whereby the metal strap with clamping device attached may be used a number of times. Of course it will be understood that the binding device may be used in other situations or wherever it is desired to reinforce a structure, and that instead of using a flat strip of metal around t-he mold or other structure a length of wire of suitable gauge may7 be employed.

l. A device for connecting the ends of a metal strap around a mold comprising a base-plate having a narrow slot therein through which a looped end of the strap is passed and iiattened on said base-plate for connecting it thereto, and a cani pivoted between ears on the base-plate and cooperating therewith for securing the other end of the strap to the device.

2. A device for connecting the ends of a metal strap around a mold comprising a base-plate having a narrow slot therein through which a. looped end of the strap is passed and flattened on said base-plate for connecting it thereto, a cam pivoted between ears on the base-plate to cooperate therewith in securing the other end of the strap to the device, and a stout lug projecting from the periphery of said cam providing means for turning the same. Y

3. A device for binding molds comprising a'base-plate having a slot therein to receive one end of a metal strap, and a cam pivoted between earsl on the plate to cooperate therewith for connecting the other end of the strap thereto; together with a metal strap bent upon itself to provide a loop the onteiportion of which is threaded through the slot in the base-plate and flattened on the base-plate.

a. A device for binding molds comprisingV a base-plate having at one end a pair of ears forming` bearings for a pulling implement and a narrow slot in said base-plate for connecting one end of a metal strap thereto, the other end of said base-plate having a pair of ears and a cam pivoted between said ears to cooperate with the base plate for securing the other end of the metal strap thereto,

5. A device for binding a metal strap around a mold comprising 2L base-plate having :i pair of ears at one end with recesses in the upper ends of said ears providing seats for a pulling instrument, a narrow transverse slot at this end of the base-plate through which an end of the metal strap is looped and attened on said base-plate,

a pair o f ears at the other end of the baseplate, a cam mounted in and between said ears to cooperate With the base-plate for securing the other end of the metal strap to the device, and a stout lug projecting from the periphery of the earn providing the means for turning the same.

ELMER E. SPEER. 

